County annual report · FIPS 25021
2020 Norfolk County, MA Power Outage Report
In 2020, customers in Norfolk County, MA went without power for an average of 6.4 hours, a total of 2.1M customer-hours (Massachusetts average 5.3 hours). That ranks 8th worst of 14 Massachusetts counties and 1178th of 3,019 nationally.
Compared with MA, the US and 2019
Coverage line is EAGLE-I's share of Massachusetts customers tracked each year.
Biggest outages in Norfolk County, 2020
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | October 7, 2020 17:45 | October 11, 2020 05:45 | 3d 12h | 43,408 | 554K |
| 2 | April 13, 2020 12:15 | April 16, 2020 10:45 | 2d 22h | 25,668 | 377K |
| 3 | September 30, 2020 07:45 | October 2, 2020 20:00 | 2d 12h | 19,623 | 143K |
| 4 | August 3, 2020 09:00 | August 8, 2020 17:45 | 5d 8h | 18,934 | 340K |
| 5 | February 7, 2020 19:45 | February 9, 2020 19:30 | 1d 23h | 18,762 | 201K |
| 6 | March 30, 2020 01:45 | March 30, 2020 06:30 | 4h 45m | 12,951 | 8,764 |
| 7 | October 30, 2020 11:45 | November 1, 2020 10:45 | 1d 23h | 9,593 | 34K |
| 8 | November 30, 2020 12:30 | December 2, 2020 03:30 | 1d 15h | 8,724 | 65K |
| 9 | March 9, 2020 01:15 | March 9, 2020 05:15 | 4h | 4,677 | 7,050 |
| 10 | November 1, 2020 12:30 | November 3, 2020 02:00 | 1d 13h | 4,046 | 5,325 |
Outage episodes by size in 2020: 216 reached 100+ customers, 61 reached 1,000+ customers, 6 reached 10,000+ customers.
Utility reliability filed with the EIA
SAIDI (average outage time per customer) and SAIFI (average interruptions per customer) that utilities serving Norfolk County reported on EIA Form 861 for 2020, or their most recent earlier filing. Utility-wide figures, not county-specific.
| Utility | EIA year | SAIDI | SAIFI | SAIDI excl. major events | SAIFI excl. major events |
|---|---|---|---|---|---|
| Massachusetts Electric Co | 2014 | 2.4 hrs | 1.12 | 1.6 hrs | 0.96 |
| NSTAR Electric Company | 2020 | 3.9 hrs | 1.14 | 65 min | 0.71 |
| Town of Braintree - (MA) | 2020 | 4 min | 0.04 | 4 min | 0.04 |
| Massachusetts Bay Trans Authority | - | - | - | - | - |
| City of Norwood - (MA) | - | - | - | - | - |
| Town of Wellesley - (MA) | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 94% of Massachusetts's customers in 2020; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 326,357 customers (ORNL modeled county customer count), including major storm days. It is comparable across counties but is not the SAIDI a utility files.
- An outage event is a continuous stretch with customers out; counts at 100, 1,000 and 10,000+ use its peak.
- Years loaded: 2015–2025. Norfolk County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Norfolk County, MA annual power outage report, 2020, data as of Oct 3, 2026 02:41 UTC, sources: DOE EAGLE-I (https://eagle-i.doe.gov/); EAGLE-I modeled customer counts (MCC) (https://figshare.com/); EIA Form 861 (utility reliability) (https://www.eia.gov/electricity/data/eia861/). https://massoutage.com/reports/2020/massachusetts/norfolk-county